I have a hdsentinel executable script, and when I type


On the terminal I get info about my HDD health.

When I type:

./hdsentinel >hd.log

I get all that info in the hd.log file.

On location /home/user/Desktop I have a file example. In name of the file above hd.log, I want to input the 3rd line from file example (3rd line is and result to be hd192.168.1.1.log. How to do this?

  • please share the output of ./hdsentinel – msp9011 May 22 '18 at 11:55
  • Hard Disk Sentinel for LINUX console 0.17.8556 (c) 2016 info@hdsentinel.com Start with -r [reportfile] to save data to report, -h for help Examining hard disk configuration ... HDD Device 0: /dev/sda HDD Model ID : TOSHIBA MQ01ACF050 HDD Serial No: X6L8C1ACT HDD Revision : AV0D2C HDD Size : 476940 MB Interface : S-ATA Gen3, 6 Gbps Temperature : 38 °C Highest Temp.: 46 °C Health : 100 % Performance : 100 % – Savke May 22 '18 at 11:59

Try this, Here I am using sed to print the nth ( 3rd ) line of a file example and use the result of the expression $(sed '3q;d' <example-file-path>) in the output file name

./hdsentinel > "hd$(sed '3q;d' /home/user/Desktop/example).log"


sed 'NUMq;d' file

Where NUM is the number of the line you want to print; so, for example, sed '3q;d' file to print the 3rd line of file.

NUMq will quit immediately when the line number is NUM.

d will delete the line instead of printing it.

So all lines, except the NUMth will be deleted because the q causes the rest of the script to be skipped when quitting.

  • 2
    sed 's/man/girl/' you are most welcome :) – Arushix May 22 '18 at 12:23
  • @Arushix ... hahaha.. best comment I have read so far... – msp9011 May 22 '18 at 12:28

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